Bryant LEGACY PURON 704D Series Installation Instructions Manual Download Page 2

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PERSONAL INJURY

AND ENVIRONMENTAL

HAZARD

Failure to relieve system pressure could result in personal

injury and/or death.
1. Relieve pressure and recover all refrigerant before

servicing existing equipment, and before final unit disposal.

Use all service ports and open all flow--control devices,

including solenoid valves.

2. Federal regulations require that you do not vent

refrigerant into the atmosphere. Recover during system

repair or final unit disposal.

WARNING

INTRODUCTION

The 704D packaged air conditioner is fully self--contained and
designed for outdoor installation (See Fig. 1). See Fig. 2 and 3 for

unit dimensions. All unit sizes have discharge openings for both

horizontal and downflow configurations, and are factory shipped
with all downflow duct openings covered. The unit may be

installed either on a rooftop, ground--level cement slab, or directly
on the ground if local codes permit. (See Fig. 4 for roof curb

dimensions.)

RECEIVING AND INSTALLATION

Step 1 — Check Equipment

IDENTIFY UNIT

The unit model number and serial number are printed on the unit
informative plate. Check this information against shipping papers.

INSPECT SHIPMENT

Inspect for shipping damage while unit is still on shipping pallet. If

unit appears to be damaged or is torn loose from its anchorage,
have it examined by transportation inspectors before removal.

Forward claim papers directly to transportation company.
Manufacturer is not responsible for any damage incurred in transit.

Check all items against shipping list. Immediately notify the

nearest equipment distribution office if any item is missing. To
prevent loss or damage, leave all parts in original packages until

installation.

Step 2 — Provide Unit Support

For hurricane tie downs, contact distributor for details and PE

(Professional Engineering) Certificate if required.

ROOF CURB

Install accessory roof curb in accordance with instructions shipped
with curb (See Fig. 4). Install insulation, cant strips, roofing, and

flashing. Ductwork must be attached to curb.

IMPORTANT

: The gasketing of the unit to the roof curb is

critical for a water tight seal. Install gasketing material supplied
with the roof curb. Improperly applied gasketing also can result in
air leaks and poor unit performance.
Curb should be level to within 1/4 in. (6.35 mm) (See Fig. 6). This
is necessary for unit drain to function properly. Refer to accessory

roof curb installation instructions for additional information as

required.

SLAB MOUNT

Place the unit on a solid, level concrete pad that is a minimum of 4

in. (101.6 mm) thick with 2 in. (50.8 mm) above grade. The slab

should extend approximately 2 in. (50.8 mm) beyond the casing on
all 4 sides of the unit (See Fig. 7). Do not secure the unit to the slab

except

when required by local codes.

GROUND MOUNT

The unit may be installed either on a slab or placed directly on the

ground if local codes permit. Place the unit on level ground

prepared with gravel for condensate discharge.

Step 3 — Provide Clearances

The required minimum service clearances are shown in Fig. 2 and
3. Adequate ventilation and outdoor air must be provided. The

outdoor fan draws air through the outdoor coil and discharges it

through the top fan grille. Be sure that the fan discharge does not
recirculate to the outdoor coil. Do not locate the unit in either a

corner or under an overhead obstruction. The minimum clearance
under a partial overhang (such as a normal house overhang) is 48

in. (1219.2 mm) above the unit top. The maximum horizontal
extension of a partial overhang must not exceed 48 in. (1219.2

mm)

IMPORTANT

: Do not restrict outdoor airflow. An air restriction

at either the outdoor--air inlet or the fan discharge may be
detrimental to compressor life.
Do not place the unit where water, ice, or snow from an overhang
or roof will damage or flood the unit. Do not install the unit on

carpeting or other combustible materials. Slab--mounted units
should be at least 4 in. (101.6 mm) above the highest expected

water and runoff levels. Do not use unit if it has been under water.

Step 4 — Field--Fabricate Ductwork

Secure all ducts to roof curb and building structure on vertical
discharge units. Do not connect ductwork to unit. For horizontal

applications, unit is provided with flanges on the horizontal
openings. All ductwork should be secured to the flanges. Insulate

and weatherproof all external ductwork, joints, and roof openings

with counter flashing and mastic in accordance with applicable
codes.
Ducts passing through an unconditioned space must be insulated
and covered with a vapor barrier. If a plenum return is used on a

vertical unit, the return should be ducted through the roof deck to

comply with applicable fire codes. A minimum clearance is not
required around ductwork. Cabinet return--air static shall not

exceed --.25 in. wc.

Step 5 — Rig and Place Unit

Rigging and handling of this equipment can be hazardous for

many reasons due to the installation location (roofs, elevated
structures, etc.).
Only trained, qualified crane operators and ground support staff

should handle and install this equipment.
When working with this equipment, observe precautions in the

literature, on tags, stickers, and labels attached to the equipment,
and any other safety precautions that might apply.
Training for operators of the lifting equipment should include, but

not be limited to, the following:

1. Application of the lifter to the load, and adjustment of the

lifts to adapt to various sizes or kinds of loads.

2. Instruction in any special operation or precaution.
3. Condition of the load as it relates to operation of the lifting

kit, such as balance, temperature, etc.

Follow all applicable safety codes. Wear safety shoes and work

gloves.

INSPECTION

The lifting/rigging bracket is engineered and designed to be

installed

only

on Small Packaged Products. This bracket is to be